Kari, FYI, eating breakfast actually revs up your metabolism so the food you do consume the rest of the day is processed better and faster by your body. Even just a piece of fruit or a granola bar would do you a world of good -- it also helps your body absorb vitamins better, which might help with your Vitamin D deficiency.
I am doing well on my diet this week, too; the weird thing about Medifast is if you go off it very abruptly and dive right into carbs, there is always an instant water weight gain. Since that's what I did last week on my trip -- I tried to keep to my small regular meals every few hours, but I also had several cocktails and enjoyed myself immensely at the parties, OMG did I miss my starches! -- I gained 5 pounds over the week. But I'm back to the stricter Medifast plan now, and I'm already back down 2 pounds in 2 days.
*shrug* I'm not stressing over those pounds at all, because they're not really "real", you know? That said, it did teach me that when I do reach goal, a slow transition back into a rounded diet is going to be the best approach. And I am sooooo close to that , I can smell it! I really want to get there in the next month, and given my previous track record, I think it's possible. As I say on my diet forum, "Goal or Bust!"